Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1990_4_a10, author = {A. R. Chekhlov}, title = {Direct products and direct sums of torsion-free abelian $QCPI$-groups}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {58--67}, publisher = {mathdoc}, number = {4}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1990_4_a10/} }
A. R. Chekhlov. Direct products and direct sums of torsion-free abelian $QCPI$-groups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1990), pp. 58-67. http://geodesic.mathdoc.fr/item/IVM_1990_4_a10/